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Pawar AP, Yadav J, Dolas AJ, Iype E, Rangan K, Kumar I. Catalyst-free direct regiospecific multicomponent synthesis of C3-functionalized pyrroles. Org Biomol Chem 2022; 20:5747-5758. [PMID: 35775588 DOI: 10.1039/d2ob00961g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An operationally simple catalyst-free protocol for the direct regiospecific synthesis of β-(C3)-substituted pyrroles has been developed. The enamine intermediate, in situ generated from succinaldehyde and a primary amine, was trapped with activated carbonyls before the Paal-Knorr reaction in a direct multicomponent "just-mix" fashion to furnish pyrroles with overall good yields. Several C3-substituted N-alkyl/aryl/H pyrroles have been produced under open-flask conditions with high atom economy and avoiding protection-deprotection chemistry.
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Affiliation(s)
- Amol Prakash Pawar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India.
| | - Jyothi Yadav
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India.
| | - Atul Jankiram Dolas
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India.
| | - Eldhose Iype
- College of Engineering and Technology, American University of the Middle East, Kuwait
| | - Krishnan Rangan
- Department of Chemistry, BITS Pilani, Hyderabad Campus, Secunderabad, India
| | - Indresh Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India.
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2
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Robert EGL, Le Du E, Waser J. Synthesis of Polycyclic Aminal Heterocycles via Decarboxylative Cyclisation of Dipeptide Derivatives. Chem Commun (Camb) 2022; 58:3473-3476. [DOI: 10.1039/d2cc00167e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oxidative-decarboxylative intramolecular cyclisation of dipeptide derivatives is reported. This transformation is promoted by phenyl iodine (III) diacetate (PIDA) in combination with BF3·OEt2. The reaction gives access to a variety...
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3
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Linkova EI, Grinev VS, Mayorova OA, Yegorova AY. The study of the reaction paths of 4-aryl-4-oxobutanoic acids with terminal aliphatic N,N-diamines. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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4
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Electrophilic reactions as methods of modification of pyrrolobenzimidazolones and pyrroloquinazolinones. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02751-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Kanyiva KS, Tane M, Shibata T. Iodine-Catalyzed Synthesis of Chiral 4-Imidazolidinones Using α-Amino Acid Derivatives via Dehydrogenative N–H/C(sp3)–H Coupling. J Org Chem 2019; 84:12773-12783. [DOI: 10.1021/acs.joc.9b01154] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyalo Stephen Kanyiva
- Global Center of Science and Engineering, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Marina Tane
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Takanori Shibata
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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Practical and Efficient Synthesis of α-Aminophosphonic Acids Containing 1,2,3,4-Tetrahydroquinoline or 1,2,3,4-Tetrahydroisoquinoline Heterocycles. Molecules 2016; 21:molecules21091140. [PMID: 27589713 PMCID: PMC6273407 DOI: 10.3390/molecules21091140] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 08/15/2016] [Accepted: 08/25/2016] [Indexed: 11/25/2022] Open
Abstract
We report here a practical and efficient synthesis of α-aminophosphonic acid incorporated into 1,2,3,4-tetrahydroquinoline and 1,2,3,4-tetrahydroisoquinoline heterocycles, which could be considered to be conformationally constrained analogues of pipecolic acid. The principal contribution of this synthesis is the introduction of the phosphonate group in the N-acyliminium ion intermediates, obtained from activation of the quinoline and isoquinoline heterocycles or from the appropriate δ-lactam with benzyl chloroformate. Finally, the hydrolysis of phosphonate moiety with simultaneous cleavage of the carbamate afforded the target compounds.
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7
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Kumar I, Ramaraju P, Mir NA, Singh A. Linear dialdehydes as promising substrates for aminocatalyzed transformations. Org Biomol Chem 2015; 13:1280-93. [DOI: 10.1039/c4ob01805b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear dialdehydes: This article summarizes the recent utilization of linear dialdehydes as appropriate substrates for amine catalyzed cascade/domino transformations.
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Affiliation(s)
- Indresh Kumar
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Panduga Ramaraju
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Nisar A. Mir
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Anoop Singh
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
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8
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Katritzky AR, Rachwal S. Synthesis of heterocycles mediated by benzotriazole. 2. Bicyclic systems. Chem Rev 2011; 111:7063-120. [PMID: 21894899 DOI: 10.1021/cr200031r] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, 32611-7200, United States.
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9
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Nishiwaki N, Hirao S, Sawayama J, Saigo K, Kobiro K. Bicyclization involving pseudo-intramolecular imination with diamines. Chem Commun (Camb) 2011; 47:4938-40. [DOI: 10.1039/c1cc10705d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Recent developments in benzotriazole methodology for construction of pharmacologically important heterocyclic skeletons. MONATSHEFTE FUR CHEMIE 2010. [DOI: 10.1007/s00706-010-0378-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Dong D, Bi X, Liu Q, Cong F. [5C + 1N] Annulation: a novel synthetic strategy for functionalized 2,3-dihydro-4-pyridones. Chem Commun (Camb) 2005:3580-2. [PMID: 16010330 DOI: 10.1039/b505569e] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and facile route to functionalized mono/bicyclic 2,3-dihydro-4-pyridones has been developed via formal [5C + 1N] annulation of readily available alpha-alkenoyl ketene-(S,S)-acetals with various aliphatic primary amines.
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Affiliation(s)
- Dewen Dong
- Department of Chemistry, Northeast Normal University, Changchun 130024, PR China.
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12
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Intramolecular cycloadditions of nitrones derived from optically active 1-alkenyl-2-imidazolecarbaldehydes: regio- and diastereoselectivity. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.07.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Katritzky AR, Suzuki K, He HY. Novel syntheses of enantiopure hexahydroimidazo[1,5-b]isoquinolines and tetrahydroimidazo[1,5-b]isoquinolin-1(5H)-ones via iminium cation cyclizations. J Org Chem 2002; 67:8224-9. [PMID: 12423156 DOI: 10.1021/jo0203241] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Condensations of chiral diamines 11a-c with benzotriazole and formaldehyde gave benzotriazolyl intermediates 12a-c; similar condensations of alpha-amino-amides 10a-c with benzotriazole and paraformaldehyde gave 14a-c. Subsequent treatment of 12a-c and 14a-c with AlCl(3) led to enantiopure tricyclic 1,2,3,5,10,10a-hexahydroimidazo[1,5-b]isoquinolines 1a-c and 2,3,10,10a-tetrahydroimidazo[1,5-b]isoquinolin-1(5H)-ones 15a-c, respectively, via Lewis acid promoted iminium cation cyclizations.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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Katritzky AR, Zhang Y, Singh SK. Novel syntheses of alpha-morpholinoamides from alpha,alpha-dichloroacetamides. J Org Chem 2002; 67:8239-42. [PMID: 12423160 DOI: 10.1021/jo020335u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dichloroacetamides, on heating with benzotriazole, morpholine, and triethylamine, produce, in a one-pot reaction, alpha-benzotriazolyl-alpha-morpholinoacetamides 4a,b. Intermediates 4a and 4b react with nucleophiles such as allylsilanes, silyl ethers, and organozinc reagents to afford diverse alpha-morpholinoamides.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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15
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Katritzky AR, He HY, Wang J. Syntheses of optically active tetrahydro-1H-pyrrolo[1,2-a]imidazol-2-ones and hexahydroimidazo[1,2-a]pyridin-2(3H)-ones. J Org Chem 2002; 67:4951-6. [PMID: 12098310 DOI: 10.1021/jo010842w] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of (2S)-2-amino-2-substituted-N-(4-nitrophenyl)acetamides 16a-c, succindialdehyde (13), and benzotriazole afforded enantiopure (3S,5R,7aR)-5-(1H-1,2,3-benzotriazol-1-yl)-3-substituted-1-(4-nitrophenyl)tetrahydro-1H-pyrrolo[1,2-a]imidazol-2-ones 17a-c, which were converted by sodium borohydride into (3S,7aR)-3-substituted-1-(4-nitrophenyl)tetrahydro-1H-pyrrolo[1,2-a]imidazol-2-ones 18a-c. Chiral (2S)-2-amino-2-substituted-N-(4-methylphenyl)acetamides 12a-d, easily prepared in two steps from N-Boc-alpha-amino acids 10a-d, similarly reacted with glutaraldehyde (20) and benzotriazole to generate 5-benzotriazolyl-3-substituted-hexahydroimidazo[1,2-a]pyridin-2(3H)-ones 21a-d, which were converted by sodium borohydride directly into optically active 3-substituted-hexahydroimidazo[1,2-a]pyridin-2(3H)-ones 22a-d.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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Katritzky AR, Singh SK, He HY. Novel syntheses of hexahydropyrimidines and tetrahydroquinazolines. J Org Chem 2002; 67:3115-7. [PMID: 11975575 DOI: 10.1021/jo010927x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1-Benzotriazolylmethyl-3-propylhexahydropyrimidine (1) and 1,3-bis(1H-1,2,3-benzotriazol-1-ylmethyl)-1,2,3,4-tetrahydroquinazoline (3) were readily prepared by reactions of N-propyl-1,3-propanediamine or 2-aminobenzylamine with benzotriazole and formaldehyde, respectively. Intermediate 1 reacted with alkyl and aryl Grignard reagents to produce N,N'-unsymmetrically substituted hexahydropyrimidines 2a,b in 90 and 92% yields, respectively. Nucleophilic substitutions of 3 with Grignard reagents, allylsilane, and triethyl phosphite gave N,N'-disubstituted 1,2,3,4-tetrahydroquinazolines 4a-f, 5, and 6 in good to excellent yields. Successive treatment of 3 with two different Grignard reagents in one-pot reaction led regiospecifically to N,N'-unsymmetrically substituted tetrahydroquinazoline derivatives 8a,b.
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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17
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Katritzky AR, Suzuki K, He HY. Convenient syntheses of unsymmetrical imidazolidines. J Org Chem 2002; 67:3109-14. [PMID: 11975574 DOI: 10.1021/jo010868n] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unsymmetrical imidazolidines 10-14, optically active imidazolidines 20-22, and 2,3-dihydro-1H-benzimidazoles 28 and 29 were synthesized in good to excellent yields by Mannich reactions of 1,2-ethanediamines 8a-c, 18a-c, or N-methyl-1,2-benzenediamine (26a) with benzotriazole and formaldehyde, followed by the nucleophilic substitution of the benzotriazolyl group with C-nucleophiles (Grignard reagents, sodium cyanide), an S-nucleophile (benzenethiol), and a P-nucleophile (triethyl phosphite).
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Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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Basso D, Broggini G, Passarella D, Pilati T, Terraneo A, Zecchi G. Synthetic approach to imidazo[1,2-a]pyridine derivatives by the intramolecular nitrone cycloaddition methodology. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00404-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Lu J, Xu X, Wang S, Wang C, Hu Y, Hu H. Novel preparation of non-racemic 1-[α-(1-azacycloalkyl)benzyl]-2-naphthols from Betti base and their application as chiral ligands in the asymmetric addition of diethylzinc to aryl aldehydes. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b204534f] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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2-Substituted-1,2,3,4-tetrahydroisoquinolines and chiral 3-carboxyl analogues from N-benzotriazolylmethyl-N-phenethylamines. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00418-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Katritzky AR, Xu YJ, He HY, Mehta S. Syntheses of 1,4-benzothiazepines and 1,4-benzoxazepines via cyclizations of 1-[2-arylthio(oxy)ethyl]-5-benzotriazolyl-2-pyrrolidinones and 3-benzotriazolyl-2-[2-arylthio(oxy)ethyl]-1-isoindolinones. J Org Chem 2001; 66:5590-4. [PMID: 11485488 DOI: 10.1021/jo010179b] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1-[2-Arylthio(oxy)ethyl]-5-benzotriazolyl-2-pyrrolidinones 6a-e, 12 and 3-benzotriazolyl-2-[2-arylthio(oxy)ethyl]-1-isoindolinones 9a-f, 14 are readily available from reactions of benzotriazole (4), 2-(arylsulfanyl)ethylamines 3, or 2-phenoxyethylamine (11) with 2,5-dimethoxy-2,5-dihydrofuran (5) or 2-formylbenzoic acid (8). Lewis acid mediated cyclizations of 6 and 9 produced novel 1,4-benzothiazepines 7a-e and 10a-f, respectively. Cyclizations of 12 and 14 gave 1,4-benzoxazepines 13 and 15, respectively.
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Affiliation(s)
- A R Katritzky
- Center for Heterocyclic Chemistry, Department of Chemistry, University of Florida, Gainesville, 32611-7200, USA.
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Simon C, Peyronel JF, Rodriguez J. A new multicomponent domino reaction of 1,3-dicarbonyl compounds: one-pot access to polycyclic N/O-, N/S-, and N/N-aminals. Org Lett 2001; 3:2145-8. [PMID: 11440565 DOI: 10.1021/ol010056d] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The first multicomponent domino transformation between 1,3-dicarbonyls 1, alpha,beta-unsaturated compounds 2, and functionalized amines 3 is described, providing a one-pot access to fused polyheterocyclic or spiropolyheterocyclic compounds 5 or 6 bearing an aminal function by formation of up to three new cycles, five novel bonds, and up to six stereogenic centers.
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Affiliation(s)
- C Simon
- Laboratoire RéSo, Réactivité en Synthèse organique, UMR au CNRS 6516, Centre de St. Jérôme, boîte D12, 13397 Marseille Cedex 20, France
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Katritzky AR, Qiu G. Efficient syntheses of 1-amido-3-aryl- and 1-amido-3-alkylimidazo[1,5-alpha]pyridines. J Org Chem 2001; 66:2862-4. [PMID: 11304214 DOI: 10.1021/jo0016632] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA.
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Katritzky AR, Mehta S, He HY. Syntheses of pyrrolo- and indoloisoquinolinones by intramolecular cyclizations of 1-(2-arylethyl)-5-benzotriazolylpyrrolidin-2-ones and 3-benzotriazolyl-2-(2-arylethyl)-1-isoindolinones. J Org Chem 2001; 66:148-52. [PMID: 11429892 DOI: 10.1021/jo001273f] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1,5,6,10b-Tetrahydropyrrolo[2,1-alpha]isoquinolin-3(2H)-ones 17a,b, 17d,e, and 5,12b-dihydroisoindolo[1,2-alpha]isoquinolin-8(6H)-ones 22a-e were prepared by intramolecular cyclizations of 1-(2-arylethyl)-5-benzotriazolyl-pyrrolidin-2-ones 15a,b, 15d,e, and 3-benzotriazolyl-2-(2-arylethyl)-1-isoindolinones 20a-e, respectively, in the presence of titanium chloride. Products from chiral amines were obtained with stereoselectivities of > or = 94%.
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Affiliation(s)
- A R Katritzky
- Center for Heterocyclic Chemistry, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
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